websql

In src/glue.rs, Glue module is a kind of wrapper interface which provides users to execute sql queries in a simple way.

It is firstly designed to run multiple sql query string.
e.g. In https://docs.rs/gluesql/0.7.0/gluesql/,

   let sqls = "
         DROP TABLE IF EXISTS Glue;
         CREATE TABLE Glue (id INTEGER);
         INSERT INTO Glue VALUES (100);
         INSERT IN

There is a lack of documentation right now.
Need to provide more usage examples.